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Finding the Fourth Proportional to 72,207.60, 108,019.80 and 62,455.20

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Solution

The fourth proportional to 72,207.60, 108,019.80 and 62,455.20 is: 93,430.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,207.60 : 108,019.80 = 62,455.20 : x
  2. Step 2: Convert to fraction form
    72,207.60/108,019.80 = 62,455.20/x
  3. Step 3: Cross multiply
    72,207.60x = 108,019.80 × 62,455.20
  4. Step 4: Simplify right side
    72,207.60x = 6,746,398,212.96
  5. Step 5: Solve for x
    x = 6,746,398,212.96/72,207.60
  6. Step 6: Final answer
    x = 93,430.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.